rocking stone

American  

noun

1. any fairly large rock so situated on its base that slight forces can cause it to move or sway.

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rocking stone British  

noun

1. Also called: logan.   logan-stone.  a boulder so delicately poised that it can be rocked

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Etymology

Origin of rocking stone

First recorded in 1730–40

Example Sentences

"That's all we've got" He leaned his spear against the rocking stone and pushed back two handfuls of hair.

From "Lord of the Flies" by William Golding

Then I raised her in my arms and was staggering across the cave toward the tunnel which led to the rocking stone.

From Jacqueline of Golden River by Coleman, Ralph P. (Ralph Pallen)

He might become suspicious and betray him, or worse yet, discover the secret of the rocking stone.

From Pocket Island A Story of Country Life in New England by Munn, Charles Clark

Close beside the fellow on the rocking stone there hung two ropes from rings in the roof.

From Caves of Terror by Mundy, Talbot

I was looking out beyond them toward the rivulet, and on my right hand and on my left the tunnel stretched away, leading respectively toward the ch�teau and to the rocking stone at the entrance.

From Jacqueline of Golden River by Coleman, Ralph P. (Ralph Pallen)